Adaptive Biotechnologies Corporation
US ˙ NasdaqGS ˙ US00650F1093

SecurityADPT / Adaptive Biotechnologies Corporation
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership188,338 shares
Latest Disclosed Value $ 2,614,132
Dimensional Fund Advisors Lp reports 86.38% decrease in ownership of ADPT / Adaptive Biotechnologies Corporation

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 188,338 shares of Adaptive Biotechnologies Corporation (US:ADPT) valued at $2,614,131 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,382,924 shares of Adaptive Biotechnologies Corporation. This represents a change in shares of -86.38% during the quarter. The current value of the position is $3,182,912 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-07 2026-03-31 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 188,338 -1,194,586 -86.38 2,614 -88.36 0.0005
2026-02-12 2025-12-31 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 1,382,924 -3,439 -0.25 22,460 8.34 0.0047
2025-11-12 2025-09-30 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 1,386,363 -3,325 -0.24 20,730 28.04 0.0044
2025-08-12 2025-06-30 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 1,389,688 -34,984 -2.46 16,191 52.94 0.0037
2025-05-13 2025-03-31 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 1,424,672 -180,204 -11.23 10,587 10.03 0.0026
2025-02-13 2024-12-31 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 1,604,876 183,881 12.94 9,622 32.27 0.0023
2024-11-07 2024-09-30 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 1,420,995 51,898 3.79 7,275 46.80 0.0018
2024-08-09 2024-06-30 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 1,369,097 -374,519 -21.48 4,955 -11.47 0.0013
2024-05-10 2024-03-31 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 1,743,616 -394,575 -18.45 5,597 -46.59 0.0015
2024-02-07 2023-12-31 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 2,138,191 -152,986 -6.68 10,480 -16.08 0.0031
2023-11-09 2023-09-30 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 2,291,177 141,231 6.57 12,488 -13.44 0.0041
2023-08-09 2023-06-30 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 2,149,946 501,585 30.43 14,427 -0.88 0.0046
2023-05-12 2023-03-31 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 1,648,361 628,622 61.65 14,554 207,814.29 0.0049
2023-02-09 2022-12-31 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 1,019,739 338,662 49.72 8 -99.86 0.0023
2022-11-10 2022-09-30 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 681,077 265,593 63.92 4,848 44.24 0.0019
2022-08-12 2022-06-30 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 415,484 -47,440 -10.25 3,361 -47.69 0.0012
2022-05-13 2022-03-31 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 462,924 -11,584 -2.44 6,425 -51.75 0.0020
2022-02-09 2021-12-31 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 474,508 264,902 126.38 13,315 86.90 0.0040
2021-11-12 2021-09-30 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 209,606 83,549 66.28 7,124 38.30 0.0023
2021-08-12 2021-06-30 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 126,057 -8,435 -6.27 5,151 -4.86 0.0016
2021-05-14 2021-03-31 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 134,492 50,701 60.51 5,414 9.26 0.0018
2021-03-08 2020-12-31 13F/A-2 ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 83,791 70,091 511.61 4,955 643.99 0.0018
2021-02-11 2020-12-31 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 83,791 70,091 4,955 1,789.4826
2020-11-12 2020-09-30 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 13,700 -16,506 -54.64 666 -54.41 0.0003
2020-08-13 2020-06-30 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 30,206 -3,517 -10.43 1,461 55.92 0.0006
2020-05-14 2020-03-31 13F ADAPTIVE BIOTECHNOLOGIES COR COM 00650F109 33,723 33,723 937 0.0005
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.